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D. C. AMBLER, OF NEW YORK, N. Y.

SETTING 0F STEAM-BOILERS.

Specification of Letters Patent No. 11,110, dated June 20, 1854.

`To all 'whom t may concern Be it known that I, D. C. AMBLER, of the city, county, and State of New York, have invented certain new` and useful Improvements in the Setting of Boilers, and that the following specification, taken in connection with the drawings, is a full and suflicient description thereof.

In the drawings Figure l, is a view of the setting partiallyin elevation and partially in section onthe line A-B of Fig. 2. Fig. 2 is a transverse section on the line C D of Fig. 1. Fig. 3 is a top view of the tiles which form the midri or partition between the ues on a larger scale. Fig. 4 is a section through said tiles and the water legs of the boilers, and the metallic bearers on the saine scale. Fig. 5 is a side view of said tiles. Fig. 6 is a view on a'large scale of the cross air pipeand nozzles thereof which admit air to promote combustion at the ends of the lues.

The object of my plan of setting is somewhat different from that usually sought, as I desire to make a given amount of lire surface as effective as possible without regard to the quantity of fueleniployed, my desire in fact being to consume as much fuel as possible under a boiler of any given size. A boiler of small size and cost will therefore be as effective as a larger one so far as the `amount of steam furnishedis 'concerned while it will burn up much more fuel tlian is usually consumed in a boiler of the saine amount of iire surface set in the ordinary manner. In all saw mills and especially in those in the southern sections of the United States, much more waste wood is furnished than is necessary tov make steam, sufficient to drive the engine which actuates the mill, and it is necessary to cart away `large quany tities of slabs and bolts, for the double pur# pose of preventing incumbrance of space around the mill and as a security against fire. This waste is usually piled in heaps at a distance and burned. The saw dust is another source of annoyance and even when carted away requires time and care in order to its proper destruction by fire. Such them in connection with such a form of boiler, as shall not be liable to accident, and is easily cleaned and accessiblefor the pur pose of repairs. Such a boiler it was not necessary for meto invent as the form commonly known as the French boiler is well adapted for securing the above namedl results.

The nature of the first part of my invention thereforeconsists in providing a boiler substantially such' as' is herein described with a grate extending under' 'its entire length ornearly so, when it is-also set in s uch manner that the products of combus-` tion shall pass inreverse directions between the heaters or water legs and the bottom of the main boiler, and shall then returnover the top of the main boiler substantiallyin the manner and for the purposes described And the nature of the second part of my inventionA consists informing the midriil' or dividing partition between `the heaters and the main boiler substantially in the manner hereinafter described. l

In the 'drawings a boiler a with heaters and connectio-ns c surrounded by brick work Z as shown, and upon proper bearers e supported in the setting are arranged gratebarsV t f extending from inside to inside ofthe setting and `forming a grate surface whose length is equal or nearly so to the length of the boiler.` f

-The boilers themselves may be supported from beams arranged over the top of the brick work or in any other usual manner. A series of ironbearers g g g are then laid uponthe heaters bridging the space between them and o n these bearers are arranged tiles /L i- 7L so shaped as to make a joint against eac-h heater and against the bottom of the main boiler. These tiles are in section like a T turned upside down and each of them lents Z Z make a `tight oint between the heaters and the sides of the setting, and peculiarly formed tiles or their equivalents m are located at each end of the main boiler subst-antially `in the manner represented in the drawings, these latter cause the products of combustion to pass in reverse directions through the ues a a. Other bearers o 0 support protectors p 79 of non, or bad conducting materials against the upper halves of the heads of the boilers and material of the same character is arranged in an arch g g over the whole top of the boiler. A

chimney is fixed as at 1 and the steam dome is shown at s; suitable fire doors are arranged along the Whole length as at t t, and

as a full supply of air is essential to a. great consumption of fuel I have arranged air pipes u u along the whole length of the boiler with one end projecting through the setting as at 'u while the other end thereof connects with cross pipes w w provided with no-zzles w.

The ends c are open and air will enter therein drawn in by t-he draft and be heated red hot or nearly so in its passage along the pipes. This air will discharge at the nozzles, and set fire to any unconsumed gases, at the same time acting as a supporter of the combustion thereof.

The drawings indicate plainly the course of the flame which parts from the center or 'nearly so of the furnace and then passes under the tiles m m and in reverse directions through the flues, ascends over the tiles m returns over the boiler toward its center and is discharged around the dome.

Every portion of the boiler is therefore surrounded by flame, and Will from the great proportionate size of furnace'be highly effective as heating surface, while the furnace is of more than 4 times the ordinary size, and Will consume, without danger of accident immense quantities of slabs, bolts, and saw dust. Doors at the ends might be useful, as a Whole slab could then be-shoved in on end. I believe howeverthat large doors at the sides as shown are better as the opening thereof does not interfere with the current of the flame.

l The bearers g g might be dispensed with and tiles laid directly upon the heaters, their expansion and contraction would then dist-urb the midriff and the plan although cheaper at first, would be less serviceable in the end.

Having thus described my method of setting boilers, I would state that I do not claim as of my invention the form of boiler herein described, neither do I limit myself to the use of a boiler provided with only tWo heaters, as more might sometimes be advantageous, neither do I claim as of my invention the methdd of distributing'hot air, nor

theprotecting of steam surface by means 0f 60 brick or tiles; but

I do claim as of my own invention- The method of setting a boiler as herein described in so far as the same consists in grate surface extending the whole length of the boiler or nearly soy when the same is employed in connection with a midriff' located substantially as described, and causing the products of combustion to travel in reverse directions substantially as specified. I also claim tiles shaped substantially as herein described in connection with bearers shaped and located substantially as described for the purpose of forming a midri or division between the flues as specified.

D. C. AMBLER.

Witnesses:

SAML. GRUBB, E. Gr. HANDY. 

